Crown Audio 1201, 2401 Troubleshooting, Energy reserve for the affected channel is dip- ping

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Micro-Tech Series Power Amplifiers

7 Troubleshooting

CONDITION: Normal operation.

CONDITION: Enable LED on, ODEP

OTHER POSSIBLE CONDITIONS TO BE AWARE OF:

The Enable (Power) LED is on, and the ODEP LEDs are on or flickering.

ODEP LEDs on indicates a high energy reserve. An ODEP LED flickering means that

the energy reserve for the affected channel is dip- ping.

CONDITION: Normal LED display but distorted sound.

POSSIBLE REASON:

•Load is wired incorrectly or

Stereo/Mono mode switch is set incorrectly. Check both.

•Input signal level is too high. Turn down your amplifier level controls, or turn down the input signal, until the clip LED goes out.

Check mixer levels and gain staging, mixer clip lights, and pads built into microphones.

CONDITION: Normal LED display but no sound.

POSSIBLE REASON:

•Input signal level is very low.

•Level controls are turned down.

•Input cable broken or not plugged in.

•Speakers not connected.

•The amplifier output level is so high that the breaker has tripped. Try to identify and correct the problem before resetting the breaker. If the problem persists, refer the unit to an autho- rized Crown Service Center.

•The amplifier output is shorted. First discon- nect your speakers from the affected chan- nel(s) one by one to determine if one of the loads is shorted.

LEDs off, no sound. Low-voltage power

supply and fan are still working.

POSSIBLE REASON:

•Transformer thermal protection has activated. Amplifier will come back on automatically when it cools.

•ODEP reserves have been depleted and the amplifier is about to activate protection.

•High-voltage power supply fuse or breaker has blown.

Check for shorts in the speaker lines. Avoid loads of 1 ohm or less. Let the amplifier cool down, then reset the breaker (Micro-Tech 2400 only).

CONDITION: All LEDs off.

POSSIBLE REASON:

•The amplifier has lost power.

•The amplifier is not plugged into the power receptacle.

•The amplifier’s circuit breaker has tripped. Allow the amplifier to cool; check for shorts in the speaker lines; remove excessive loads. Then reset the breaker.

•The amplifier has blown its internal fuse for the low-voltage power.

supply. Refer the unit to a qualified technician.

•The power switch is off.

Operation Manual

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Contents 06/04 Micro-Tech 600, 1200 601, 1201Some models may be exported under the name Amcron 102990-8Output wiring Important Safety InstructionsUse only with a cart, stand, bracket, or table European Representative’s Name and Address Safety StandardDeclaration of Conformity Crown International, IncTable of Contents Features Welcome How to Use This ManualUnpacking Your Amplifier Ensure Proper Cooling SetupInstall Your Amplifier You may also stack amps without using a cabi- netShows connector pin assignments for Choose Input Wire ConnectorsOutput Connections Choose Output Wire and Con- nectorsParallel-Mono Mode Wire Your System Stereo ModeBridge-Mono Mode Inputs Connect input wiring to Channel 1 onlyConnect to AC Mains Set Ground Lift SwitchStartup Procedure Set Input SensitivityOperation PrecautionsDo Not operate the amplifier with the Odep LEDs turning off Dust Filter Odep Indicators Output Device Emulation ProtectionEnable Indicator Power SwitchInput Sensitivity Switch Rear Panel Facilities Power CordStereo/Mono Modes Switch Reset Switches Micro-Tech 2400 onlyAdvanced Features Options Input Connectors Option Accessories Cooling Fan OptionsFilter Cleaning Overview Principles of OperationCircuit Theory Stereo Operation Circuit Block DiagramParallel-Mono Operation Bridge-Mono OperationSupply and fan are still working TroubleshootingHigh-voltage power supply fuse or breaker has blown Energy reserve for the affected channel is dip- ping120 VAC, 60 Hz Units, Bridge mono mode Specifications120 VAC, 60 Hz Units, Parallel mono mode Shippping Weight Power Draw at IdleDimensions Width, Height, Depth Weight 120VAC, 60-Hz units Net WeightAC Power Draw Thermal Dissipation AC Power Draw Thermal Dissipation Micro-Tech Series Power Amplifiers 12/01 WarrantyWorldwide Except USA & Canada Card Number Exp. Date Crown Factory Service InformationVisa Purchase Order for Crown Dealer

MT-601, 1201, 2401 specifications

Crown Audio is synonymous with high-performance amplifiers, and their models 1201, 2401, and MT-601 embody the brand's commitment to quality and reliability in sound reinforcement. Each model caters to different needs, making them valuable assets in live sound and installation applications.

The Crown 1201 amplifier is designed for versatility, providing 120 watts per channel at 8 ohms. This model features Crown's patented "Power Factor Control," which ensures maximum power delivery with minimal distortion and heat generation. The 1201 is lightweight yet rugged, making it ideal for portable applications. It's equipped with comprehensive protection circuitry, including short circuit and thermal protection, safeguarding both the amplifier and connected speakers.

Moving to the Crown 2401, it ups the power with 240 watts per channel at 8 ohms. The 2401 also employs Crown's advanced input circuitry, which enhances audio clarity and reduces noise. Its design includes an intelligent cooling system with variable-speed fans, accommodating demanding situations while ensuring quiet operation. The amplifier's robust build quality and efficient power usage make it a favorite among sound engineers who require both reliability and performance.

The MT-601 is a versatile addition to Crown's lineup, known for its flexibility in various applications. Delivering 300 watts per channel at 8 ohms, the MT-601 features an advanced monitoring system that provides real-time feedback on system performance. This capability allows sound technicians to make adjustments on the fly, optimizing sound quality. The MT-601's lightweight chassis and modern design make it easy to integrate into any setup.

All three models embody Crown Audio's dedication to innovation through technologies such as output peak limiter and gain monitoring, which prevents signal clipping and distortion. They also feature variable-speed cooling fans that adapt based on the amplifier's thermal load, ensuring efficiency without compromising performance.

In summary, Crown Audio’s 1201, 2401, and MT-601 amplifiers showcase the brand’s expertise in delivering powerful, reliable audio solutions. With their unique features, robust build quality, and advanced technologies, these amplifiers meet the diverse needs of both live performance environments and fixed installations, making them an ideal choice for audio professionals.
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